Stomach Bug July 2024 India. Up to week 17 of the 2023/2024 season, 252. The most common way to develop viral gastroenteritis — often called stomach flu — is through contact with an infected person or by consuming contaminated food or water.

In this case, a virus causes the stomach flu, and when you come down with the stomach flu, the symptoms are hard to miss. The stomach flu (norovirus) is an acute form of gastroenteritis, or inflamed stomach or intestinal lining caused by a virus, bacteria or parasite.